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Air-cooled MIG welding gun with curved handle and 15 ft cable

Tweco

Tweco WM400-15-3545 Air Cooled MIG Welding Gun

SKU CH-N166-EDY2G MPN WM400-15-3545

Air-cooled MIG gun rated 400 A at 60 % duty cycle, 15 ft cable, .045 in maximum wire, curved handle, fixed 60° neck

  • TypeAir Cooled
  • Air-cooled design handles 400 A output without external water supply
  • 60 % duty cycle sustains long welding runs at full rated current
  • 15 ft cable gives wide reach around large workpieces
  • Curved handle with standard trigger reduces operator fatigue during extended use
  • Fixed 60° neck positions wire accurately for aluminium and solid wire up to .045 in

Tweco WM400 Air-Cooled MIG Gun

The Tweco WM400-15-3545 is an air-cooled MIG welding gun rated for 400 amperes at a 60 percent duty cycle using CO2 shielding gas. It accepts solid or aluminium wire up to .045 inch diameter and comes with a 15 foot cable. The gun uses a Tweco-compatible rear connection and the WS14 tip series.

60 Percent Duty Cycle Limit

At the full 400 ampere rating the gun must rest for four minutes out of every ten to avoid overheating. Continuous welding above this cycle will cause the air-cooled handle and cable to exceed safe temperatures. Operators running long beads at maximum current should plan pauses or reduce amperage to stay within the rated thermal envelope.

Fixed 60 Degree Neck and Curved Handle

The neck tube is fixed at a 60 degree angle and cannot be rotated or swapped for a different geometry. The curved handle positions the standard trigger for a natural grip during extended passes. Because the rear connection is Tweco-compatible, the gun fits existing Tweco-style feeders without an adapter, but it will not suit feeders that require a different plug pattern.

Highlights

  • Air-cooled design handles 400 A output without external water supply
  • 60 % duty cycle sustains long welding runs at full rated current
  • 15 ft cable gives wide reach around large workpieces
  • Curved handle with standard trigger reduces operator fatigue during extended use
  • Fixed 60° neck positions wire accurately for aluminium and solid wire up to .045 in

Specifications

BrandTweco
Model358-1047-1002
TypeAir Cooled

Questions about this item

Should I choose the 15 ft cable length or a different length for my setup?

The 15 ft cable suits most bench and portable MIG work; choose a shorter gun only if you need less weight or a longer one for extended reach.

What does the 400 A maximum current mean when I am actually welding?

You can weld continuously at 400 A for six minutes out of every ten; after that the gun must cool before you resume.

How does the Tweco-compatible rear connection affect wire feeding and consumables?

It mates with standard Tweco feeders and drives, so you can use WS14 tips and .045 in wire without adapters.

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